test(web): import history components after their mocks (M494)

HistoryRow now renders LikeButton, and both history test files imported
the component before the likes mock helper. LikeButton then loaded while
emptyLikesMock was still uninitialised, and the suites failed at import.
Every other suite imports components after its mocks.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/routes/library/history/page.test.ts

@@ -1,6 +1,5 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 import { render, screen } from '@testing-library/svelte';
-import HistoryPage from './+page.svelte';
 import type { HistoryEvent, HistoryResponse } from '#lib/api/history.js';
 import { makeTrack } from '#test-utils/fixtures/track.js';
 import { emptyLikesMock } from '../../../test-utils/mocks/likes';
@@ -63,6 +62,10 @@ vi.mock('#lib/branding.js', () => ({
   pageTitle: (s: string) => `Minstrel · ${s}`
 }));
 
+// Imported after the mocks: the component pulls in LikeButton, whose
+// mocked module must already be initialised.
+import HistoryPage from './+page.svelte';
+
 describe('library/history page', () => {
   beforeEach(() => {
     mockData = { pages: [] };